feat: Fixed the dilemma of owner field in ToDo document

(cherry picked from commit b28c75a82f)

(cherry picked from commit 124ae91388)

feat: savepoint contextmanager

also fix `time` import

syntactic sugar around frappe.db.savepoint and rollback

feat(blog): Browse by category

* Simplified and refactored logic
* Added type hints for where it gets really unbearable :')
* Minor perf improvements & better API usages

Clear cached maps via Document.clear_cache

fix: Do not allow rebuilding of tree for doctypes without `lft` & `rgt`

fix: renaming a document updates the modified timestamp

UI tests can now be colocated where they make more sense.
The filename must start with ui_test_ and end with .js to be
picked up by cypress.

Add option to filter blogs by category on blog list

fix(ux): add "Show Dashboard" check for tab breaks

- Like we do in client-side

- To fix order of fields in quick entry form

To avoid "Not Saved" state even after saving the document